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Improvement of Piglet Rearing’s Energy Efficiency and Sustainability Using Air-to-Air Heat Exchangers—A Two-Year Case Study

Author

Listed:
  • Hauke F. Deeken

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany)

  • Alexandra Lengling

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany)

  • Manuel S. Krommweh

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany
    Current address: Federal Office for Agriculture and Food, Deichmanns Aue 29, 53179 Bonn, Germany.)

  • Wolfgang Büscher

    (Institute of Agricultural Engineering, University of Bonn, Nußallee 5, 53115 Bonn, Germany)

Abstract

Pig farming in mechanically ventilated barns requires much electricity for ventilation or exhaust air purification. Furthermore, thermal energy is needed to fulfill the animals’ temperature requirements, especially in piglet rearing. Electrical and thermal energy input leads to CO 2 emissions and operating costs. Up to 90% of heat losses are due to the exhausted air. Heat exchangers can recover thermal energy from the warm exhaust air and transfer it to the cold fresh air. This study aimed to investigate energy consumption, efficiency, CO 2 emissions, and energy costs when using heat exchangers in a German piglet rearing barn under practical conditions in combination with exhaust air purification. The following parameters were obtained for a two-year period: air temperatures, air flow rates, and electricity and liquefied natural gas consumption; the latter were used to calculate CO 2 emissions and energy costs. In total, 576,042 kWh el,th and 616,893 kWh el,th (years 1 and 2) of energy were provided, including 290,414 kWh th and 317,913 kWh th of thermal energy recovered. Using heat exchangers reduced CO 2 emissions by up to 37.5% and energy costs by up to 19.7% per year. The study shows that piglet rearing can increase its ecological and environmental sustainability by using heat recovery.

Suggested Citation

  • Hauke F. Deeken & Alexandra Lengling & Manuel S. Krommweh & Wolfgang Büscher, 2023. "Improvement of Piglet Rearing’s Energy Efficiency and Sustainability Using Air-to-Air Heat Exchangers—A Two-Year Case Study," Energies, MDPI, vol. 16(4), pages 1-30, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1799-:d:1065415
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    References listed on IDEAS

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